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ASAP II - Auto Sampler
for Airborne Particulates
Your Mail Room Solution!
Read about an actual
mail room installation HERE>>
(508 KB PDF)
OVERVIEW
The ASAP II collection/detection system continuously monitors for the presence of aerosol biohazards and will identify biological agents ranging from protein toxins to whole cells and spores as frequently as every 20 to 30 minutes. It is an integration at hardware and software levels, of Research International's proven SASS 2300 multiple-effect air sampler technology and its RAPTOR four-channel bioassay system. ASAP II may be provided with a small fixed-installation environmental enclosure (the ASAP IIa, as seen on this page) that maximizes reagent life and unattended monitoring time, or in component form for minimum weight and volume (ASAP IIb).
In operation, the SASS 2300collector (US patent 6,532,835), samples air from targeted areas continuously and transfers particulates in the air to a secondary water phase of about 4 to 5 ml volume: Aerosol sampling is performed using aerodynamically sound methods certified by fluid dynamic software models. Water samples of 1 to 2 cc are periodically transferred from the SASS 2300 to the RAPTOR. The RAPTOR then automatically performs a multi-step bioassay for up to four bio-targets on the liquid sample using a disposable assay coupon. Each of these 4-channel assay coupons may be reused from 20 to 50 times over a 36-hour unattended operating period before replacement of the coupon and related reagents is necessary. This provides extremely competitive per-assay costs and allows operation by minimally trained personnel.
The fixed-installation system includes 5-day reservoirs for wash and sampling fluids and waste water, yet weighs only 80 pounds (36 kg) and consumes an average power of 30 watts. A Windows® software package installed on a remote laptop or desktop PC allows operating personnel to monitor system and assay results in real-time and to introduce random biosamples into the workflow as needed. A large green/amber safety light connected to one of the PC's USB ports immediately communicates system status to nearby workers.
Developmental sandwich format fluoroimmunoassays are offered for ricin and anthrax. Various researchers have also demonstrated good sensitivity in a lab setting for a number of other BW agents including Francisella tularensis, Y. pestis F1 antigen, botulinium toxin, and Straphylococcus enterotoxin B. Many other pathogens and toxins may also be targeted with relative ease: contact us to discuss your needs.
OPERATING PRINCIPLES: ASAP II AIR SAMPLER
A schematic representation of the ASAP II's air sampler is shown in Figure 1. Sampled air travels through four main sections: a cyclonic cup, stripping column, cistern, and water feedback loop. A high-efficiency centrifugal blower at the sampler's exit pulls air through the unit. When operating, incoming air enters at the cyclonic cup perimeter, creating strong vortex action and a rapidly swirling film of water on exposed surfaces. This water film passes across the air inlet region, forming a water curtain through which sampled air first passes.
Figure 1: Schematic diagram of the gravity feed system of the ASAP II SASS air sampler.
Concurrently, a centrally located nozzle projecting from the cup base injects additional water. This location is subject to high air shear and fluid discharged from the nozzle into the cup forms a fine spray that is particularly useful for impingement collection of smaller particles and molecular species. The rapidly rotating air then enters a vertical stripping column where additional particulates are captured by centrifugal action: Air-water shear forces in this section create a concurrent upward flowing water film on the interior surface.
This film and the sampled air are discharged into a large diameter cistern section. Entering water is trapped and gravity-fed back into the cyclonic cup via a feedback tube and the aforementioned nozzle, while sampled air discharges through the fan. This 'pumpless' water recirculation loop will cycle a typical 4 to 5 cc fluid inventory through the unit from 6 to 20 times per minute.
Fluid Control Subsystem
Liquid inventory is monitored with a proprietary sensor attached to the water feedback tube. Water inventories may be
maintained within a recommended range of about 4 cc to 5 cc with an accuracy of a few tenths of a cc, independent of
temperature, relative humidity, or operating time. Samples may be removed at any point independent of ongoing air sampling,
using the on-board microcontroller based peristaltic pump. A flow rate of approximately 12 cc/minute at a maximum
delivery pressure of about 300 mmHg is provided. Pump power is a modest 180 mW at 12 V DC.
For more information on the SASS 2300 technology used in the ASAP II™ click HERE>>
OPERATING PRINCIPLES: ASAP II Bio-IDENTIFIER
The ASAP II uses bio-identification technology that is based on the company's RAPTOR 4-channel fluorometric
assay system (US patents 6,082,185 and 6,136,611). This bio-identifier can be used for high-sensitivity monitoring
of biological agents, toxins, explosives, and chemical contaminants. It can automatically perform factory- or
user-defined, multi-step, fluid transfer protocols while simultaneously tracking fluorescently-tagged chemical
reactions occurring on the surface of each of the system's four disposable optical waveguide sensors (see Figure 2).
Each waveguide may be used to target a different pathogen or toxin, allowing the simultaneous monitoring of up to four different pathogens. The results of these assays are displayed on a four line x 16 character LCD. For the fixed-installation ASAP IIa, executive-level decisions are dictated from a desktop or laptop PC via an RS-232 link using the Windows-based user interface provided.
Figure 2: RAPTOR™ bioassay coupon.
Each waveguide may be used to target a different pathogen or toxin, allowing the simultaneous monitoring of up to four different pathogens. The results of these assays are displayed on a four line x 16 character LCD. The RAPTOR can also be run from a desktop PC, via an RS-232 link, using Windows-based software that is provided with the system.
USER CONTROLS/DISPLAY
PC-based control software provides user-friendly system status information and local or global network connectivity.
| Characteristic | Description |
| Use profile | Automated/programmed aerosol or liquid sample collection and bio- identification of targeted toxins, viruses, bacteria or spores. Continuous sampling, minimal downtime. |
| Functional availability(1) | >99.3% |
| Air sampling rate | 265 to 325 LPM, depending on blower option selected |
| Bioassay profile | Four simultaneous assays performed on 1 cc samples using a credit card-size assay coupon. Coupon and associated reagents provide up to 50 assays over a 36-hour use period. (2) |
| Assay time | Dependent on assay and user. 15 to 30 minutes for collection and identification process is typical. |
| Sensitivity | Dependent on analyte; 1 ppb is typical for toxins, 100-10,000 CFU/ML for bacteria. |
| Sample preparation | None for aerosol samples, none or minimal for liquid samples; solids must be minimally extracted with buffer. |
| Environmental conflicts | Minor |
| User Interface | Windows™ software package on PC of user's choice provides operation monitoring, time chart of assay results, and manual over-ride functions. |
| Fluids Handling | Bi-directional peristaltic pumps. Reagent recovered at the end of each assay for reuse. |
| Fluids storage | Environmental cabinet/Bio-identifier: reagent; 5-day supply of buffer; 5 day supply of disinfectant solution. Air sampling station: 5-day supply of distilled water. |
| Physical size | Environmental cabinet/Bio-identifier: 18.5" W x 25.75" H x 19.5" D (47 x 65.4 x 49.5cm) Air sampling station: 15.5" W x 31" H x 14”D (39.4 x 78.7 x 35.6cm). |
| Weight | Environmental cabinet/Bio-identifier: 66.7 lbs (30.2 kg) Air sampling station: 12.9 lb (5.9 kg) |
| Operating temperature range | Above freezing to 45° C |
| Storage range | -29° C to 66° C |
| Alarms | Large green/amber status light; annunciator optional |
| User training required | Minimal training required for casual operators |
| Communication | RS-232 bi-directional serial link to PC |
| Data storage/ programmability | EEPROM retains raw/processed data for over 200 assays. Operating protocols reprogrammable over RS-232 link. |
| Power Consumption | 62 W @ 115 VAC, nominal. |
| Humidity | 5% to 95%, non-condensing. |
| Notes: | |
| 1) | Functional availability is the percentage of total work time that the system is functional, averaged over a 90 calendar day period. |
| 2) | Maximum use period empirically determined in a mailroom environment. Other use situations may result in different coupon lifetimes. |
Research International reserves the right to change specifications on any of the devices mentioned without prior notification.
Safety Act 2002 Approved Product
Application Areas:
- Clean Rooms
- Government or corporate mailrooms
- Food processing
- Homeland security
- Indoor air quality
Air Sampler Key Features:
- Air Collection Rate: 325 LPM using 30,000 hour life brushless fan.
- Particulates Range: 1 to 10 um.
- Air/Liquid Concentration Ratio: 65,000/min. nominal.
- Liquid inventory maintained at user- preset level independent of collection time, relative humidity, or temperature.
- Liquid Inventory: 4 to 5cc, nominal; continuously adjustable under computer control.
- Make-Up Water: System includes 8 L distilled water reservoir that provides fresh water needs for more than 5 days.
- Physical Size: Environmental cabinet/Bio-identifier: 18.5" W x 25.75" H x 19.5" D (47 x 65.4 x 49.5cm). Air sampling station: 15.5" W x 31" H x 14" D (39.4 x 78.7 x 35.6cm)
- Weight: Environmental cabinet: 66.7 lbs (30.2 kg). Air sampling station: 12.9 lb (5.9 kg)
- 62 W @ 115 VAC, nominal.
Bio-Identifier Key Features:
- Detects virtually all bio-threats: Spores, bacteria, viruses and toxins
- Minimal or no sample pre-preparation
- Insensitive to most interferents. Has been used to test whole blood, urine, raw sewage, milk, and 10% meat slurries.
- Fast; 7-15 minutes per assay depending on analyte
- High sensitivity; 50 to 3 x 104 CFU/ml typ. for bacteria and spores; 1 ng/ml typ. for proteins.
- All fluids and reagents stored on-board.
- Controls air sampling process for continuous monitoring applications when coupled to Research International's SASS 2300 air sampler.
More Information:
- For more information on the RAPTOR bioassay technology used in the ASAP II click HERE>>
- For the ASAP IIb, please refer to the individual Specification sheets for the SASS 2300 air sampler and RAPTOR biodetector.
- Visit American Safe Air's web site to learn about Negative Pressure Mail Rooms that the ASAP II can be installed in.
- Adobe® Acrobat® Reader is necessary for viewing and printing .pdf files and is available to download at no charge from Adobe Systems.